Preparation of amines
AssigneeMonsanto Company
InventorAbul F. M. Iqbal
Life of this patent
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Abstract
Amines are prepared by reacting ammonia, a primary amine or a secondary amine with an olefin, carbon monoxide and water in the presence of a rhodium catalyst which is rhodium oxide or a rhodium compound capable of forming a rhodium carbonyl and iron carbonyl.
Claims5
In an improved process for the preparation of amine by the catalytic reaction of (1) a nitrogen compound selected from the group consisting of ammonia, ammonium formate, N-methylprrolidine, pyrrolidine, methylamine, dimethylamine, piperidine, N-methylpiperidine, aminomethylcyclohexane, cyclohexylamine, and pyridine, (2) olefin selected from the group consisting of ethylene, cyclohexene, octene dodecene, norbornene and tetradecene, (3) carbon monoxide and (4) water, the improvement which comprises the step of effecting the reaction in the presence of iron pentacarbonyl and a rhodium compound selected from the group consisting of rhodium oxide, rhodium hydroxide, rhodium acetate, rhodium carbonyl, rhodium chloride, tris(triphenylphosphine)rhodium chloride, and rhodium carbonyl chloride, the iron pentacarbonyl being present at 0.5-5 mol % based on the olefin, and the ratio of iron pentacarbonyl to rhodium compound being from 10:1 to 100:1.
In am improved process for the preparation of N-hexahydrobenzylpyrrolidine by the catalytic reaction of (1) pyrrolidine, (2) cyclohexene, (3) carbon monoxide and (4) water, the improvement which comprises the step of effecting the reaction in the presence of iron pentacarbonyl and rhodium oxide, the molar ratio of iron carbonyl to rhodium oxide being in the range of from about 10:1 to about 100:1.
Dependencies are inferred from the claim text.